112 Mr. F. W. Edwards on 



the usual hlackish dot over the base of each antenna. 

 Anteuua3 with the first few joints ochreous ; flagelhim 

 mostly dark ; first flagellar joint slender, as long as the first 

 scapal, second and third shorter, almost cylindrical; the 

 following joints somewhat convex beneath. Thorax coloured 

 much as in the other species of the group. Middle praescutai 

 stripe reaching front margin; pronotum with a dark spot 

 al)ove; scutellum yellowish with two dark spots, nearly 

 contiguous, close to base; postnotum mostly dark brownish, 

 more or less grey-dusted, a narrow median grey line 

 enlarging at tlie tip into a grey spot. Abdomen dark 

 brownish dorsally, with a rather broad ochreous median 

 stripe, which is not distinctly traceable beyond the apex of 

 the second tergite; rather narrow pale ochreous lateral 

 stripes ; venter pale, especially towards the base. Hypo- 

 pygium : ninth tergite bilobed, the median excavation 

 broadly V-shaped, each lobe on its outer face with a tuft of 

 lung golden hairs. Eighth sternite with the usual semi- 

 circular excavation, with yellow hairs which are not very 

 conspicuous. Outer clasper a little over twice as long as 

 broad, almost square-ended, without conspicuous yellow 

 hairs projecting inwards from its base. Inner claspers 

 clubbed on the apical half. Oinpositoi- reddish; anal valves 

 long, slender, straight, hairy beneath. Legs brownish 

 ochreous, tarsi darker apicall}' ; femora and tibiae rather 

 broadly black at the tips ; tips of hind tibiae considerably 

 swollen, especially in the male, in which sex the tip of the 

 tibia for a distance of over a millimetre is more than twice 

 the average diameter of the joint. Fifth tarsal joints of 

 male modified in the usual way. Wings brownish-tinged, 

 base, costal cell, stigma, and a suffusion in the base of the 

 basal cells darker brown ; a slight suffusion round the fork 

 of Cu and at the extreme tip of Ax ; a faintly indicated pale 

 area above the discal cell, just before the stigma. Cross- 

 vein r before base of R^ ; Rs equal to R2+3 5 stem of cell M^ 

 very short, about one-eighth to one-sixth as long as the cell ; 

 Ml and Mg parallel ; Cu^a very oblique, fused for a short 

 distance with M3. Halteres blackish, base of stem ochreous. 



Length of body, S, 26-30 mm.; ? , 35 mm. Wing 

 34-42 mm. 



Formosa: Koshun, 25. iv. -35. v. 1918 {J. Sonan, 

 K. Miyake, and M. Yoshino), 1 J (type). Taito, 25. ii.- 

 27.iii. 1917 {S. Inaniura, J. Sonan, and M. Yoshino), ] c? . 

 Kusukusu, 19. v. 1918 {K. Miyake), 1 ? . North China 

 {Fortune), 1 cT . This last specimen is certainly conspecific 



